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  • NetCDF: Attempting netcdf-4 operation on netcdf-3 file · 3 ✖

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  • MEMBER · 3 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
1485155675 https://github.com/pydata/xarray/issues/5515#issuecomment-1485155675 https://api.github.com/repos/pydata/xarray/issues/5515 IC_kwDOAMm_X85Yha1b kmuehlbauer 5821660 2023-03-27T13:59:40Z 2023-03-27T13:59:40Z MEMBER

Late to the party. If this is still an issue for you @mickaellalande, MODIS data can also be read using engine="rasterio" (needs rioxarray).

```python In [1]: import xarray as xr ...: with xr.open_dataset('source/MODIS/MOD10C1.A2000055.061.2020037182124.hdf', engine="rasterio") as ds: ...: display(ds) ...: <xarray.Dataset> Dimensions: (band: 1, x: 7200, y: 3600) Coordinates: * band (band) int64 1 * x (x) float64 -180.0 -179.9 -179.9 ... 179.9 180.0 * y (y) float64 89.97 89.92 89.88 ... -89.93 -89.98 spatial_ref int64 ... Data variables: Day_CMG_Snow_Cover (band, y, x) float32 ... Day_CMG_Clear_Index (band, y, x) float32 ... Day_CMG_Cloud_Obscured (band, y, x) float32 ... Snow_Spatial_QA (band, y, x) float32 ... Attributes: (12/50) ALGORITHMPACKAGEACCEPTANCEDATE: 09-2013 ALGORITHMPACKAGEMATURITYCODE: Normal ALGORITHMPACKAGENAME: MOD_PR10C1 ALGORITHMPACKAGEVERSION: 6 ASSOCIATEDINSTRUMENTSHORTNAME.1: MODIS ASSOCIATEDPLATFORMSHORTNAME.1: Terra ... ... SNOWCOVERPERCENT: 28 SOUTHBOUNDINGCOORDINATE: -90.0 SPSOPARAMETERS: none VERSIONID: 61 WESTBOUNDINGCOORDINATE: -180.0 ZONEIDENTIFIER: Other Grid System

```

 
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   NetCDF: Attempting netcdf-4 operation on netcdf-3 file 928381010
867821781 https://github.com/pydata/xarray/issues/5515#issuecomment-867821781 https://api.github.com/repos/pydata/xarray/issues/5515 MDEyOklzc3VlQ29tbWVudDg2NzgyMTc4MQ== shoyer 1217238 2021-06-24T17:30:07Z 2021-06-24T17:30:07Z MEMBER

OK, so the (misleading) error message here is ultimately coming from the underlying netCDF library, not Xarray.

Inspecting these files, it looks like they are HDF4 files, not netCDF3. We haven't really tested HDF4 files much with Xarray, but it would be nice to support them.

 
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   NetCDF: Attempting netcdf-4 operation on netcdf-3 file 928381010
866968227 https://github.com/pydata/xarray/issues/5515#issuecomment-866968227 https://api.github.com/repos/pydata/xarray/issues/5515 MDEyOklzc3VlQ29tbWVudDg2Njk2ODIyNw== shoyer 1217238 2021-06-23T16:03:58Z 2021-06-23T16:03:58Z MEMBER

could you kindly share the full error traceback?

 
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   NetCDF: Attempting netcdf-4 operation on netcdf-3 file 928381010

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